Audi S4 A4 B9 Sline Carbon Fiber Rear Diffuser (2017-2019): Hand-Laid Carbon Weave Replacement

Fitted to the Audi S4 A4 B9 Sline (2017 2019): Hand Laid Carbon Weave Replacement, it hides the underside of the rear bumper and adds the motorsport look the standard car lacks.

Fits: Audi S4 A4 B9 Sline (2017 2019): Hand Laid Carbon Weave Replacement

The mounting points line up with the factory lower bumper fixings on the Audi S4 A4 B9 Sline.

Vacuum-bagged carbon fiber, autoclave cured, then finished with a UV-stable clear coat that resists yellowing in strong sun.

It fixes from underneath with the supplied screws and clips; removing the rear bumper is not necessary on the Audi S4 A4 B9 Sline.

If your car has a factory tow bar, the diffuser may need trimming around the mounting bracket.

Standard output is gloss clear coat over 3K twill, but matte, satin, forged carbon and tinted clear coats (including red and blue) are all available at order time.

• Gloss, matte, satin or forged carbon finish
• 3K twill, 6K twill, plain weave or carbon-kevlar hybrid
• Coloured tinted clear coat (red, blue, yellow)
• Logo application or badge cut-outs on request

We ship to more than thirty countries, mostly direct to workshops, tuners and distributors who resell under their own label.

Each part is weighed and measured against the master sample, then wrapped in foam and boxed in a double-wall carton with the hardware bagged separately.

OEM and private-label work is welcome: your part number, your logo, your packaging, with an NDA if you need one.

A ceramic or wax coat once a season is all this needs – the clear coat handles UV, but it is not a scratch-proof layer.

Production is 10-15 business days because the part is made after you order it, not pulled off a shelf; after that it ships with tracking and a 12-month defect warranty.

In the box: diffuser, screws, clips and a fitment card.